Clipped Cub
Per the picture of the torque tube install, it would appear to be a great deal more robust than its join to the elevator Rib. Going from torsion to shear to compression (at the elevator surface), the weak link looks to be the tube to Rib join. Focal stress on this area is chaotic, compared to the Tube's single stress purpose? (Torsion).
For wartime, the design is elegant. For racing, I keep thinking a full length torque tube, tip to tip, solves the problems of tab, elevator warp, and wear, plus asym roll? At some stage, an all new a/c will be needed. The nagging feeling is there, that to butcher these priceless relics beyond their designed purpose is arrogant, and obviously, risky.
imho